<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>404 - Page Not Found</title>
    <style>
        /* 基础样式 */
        body {
            margin: 0;
            padding: 0;
            font-family: 'Arial', sans-serif;
            background-color: #f4f4f9;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            color: #333;
        }

        .container {
            text-align: center;
            max-width: 600px;
            padding: 20px;
            background: #fff;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
            animation: fadeIn 1s ease-in-out;
        }

        h1 {
            font-size: 6rem;
            margin: 0;
            color: #ff6b6b;
            animation: bounce 2s infinite;
        }

        h2 {
            font-size: 2rem;
            margin: 10px 0;
        }

        p {
            font-size: 1.2rem;
            margin: 20px 0;
            color: #666;
        }

        a {
            display: inline-block;
            margin-top: 20px;
            padding: 10px 20px;
            background-color: #ff6b6b;
            color: #fff;
            text-decoration: none;
            border-radius: 5px;
            transition: background-color 0.3s ease;
        }

        a:hover {
            background-color: #ff4757;
        }

        /* 动画 */
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% {
                transform: translateY(0);
            }
            40% {
                transform: translateY(-20px);
            }
            60% {
                transform: translateY(-10px);
            }
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>404</h1>
        <h2>Oops! Page Not Found</h2>
        <p>The page you are looking for might have been removed, had its name changed, or is temporarily unavailable.</p>
        <a href="/">Go to Homepage</a>
    </div>
</body>
</html>